[EXTERNAL] Multiple BMCs in a system: IPMB? Redfish? MCTP?
Neeraj Ladkani
neladk at microsoft.com
Thu Apr 30 09:43:06 AEST 2020
Nancy,
Just trying to understand, are there any specific scenarios that need aggregation at Head Node using BMC-BMC communication? Have you thought about aggregation at cloud service?
Neeraj
From: openbmc <openbmc-bounces+neladk=microsoft.com at lists.ozlabs.org> On Behalf Of Nancy Yuen
Sent: Wednesday, April 29, 2020 3:52 PM
To: OpenBMC Maillist <openbmc at lists.ozlabs.org>
Subject: [EXTERNAL] Multiple BMCs in a system: IPMB? Redfish? MCTP?
I've talked with some people a while back (long while back) about multiple BMCs in a system. Either for redundancy or managing separate parts of a system. I'm wondering what other people are thinking in this area if at all.
We are considering similar designs and I'm looking into options for BMC-BMC communications. Some BMCs may not be externally accessible. Here are some options that we've looked at:
1. i2c/IPMB
2. usbnet/Redfish
3. i2c/MCTP/PLDM or something else?
4. internal network via switch chip/Redfish or MCTP
I'd like to reduce our use of IPMI so I want to avoid (1).
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Nancy
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